I'm in the market to purchase a polarizing filter and have been reading up on the following:

Singh Ray LB Warming PolarizerSingh Ray LB Neutral PolarizerB+W XS-Pro MrC Nano Circular Polarizer - What I like about this one is it has front threads, which means I can add another filter in front without losing the polarization effect. If anyone has used this and would be willing to comment on the pros and cons that would be fantastic!

Amongst the 3 choices, which one would you choose? I will greatly appreciate any insights you might have to offer. I primarily shoot landscapes, nature and quite a bit of waterfalls.

I'm in the market to purchase a polarizing filter and have been reading up on the following:

Singh Ray LB Warming PolarizerSingh Ray LB Neutral PolarizerB+W XS-Pro MrC Nano Circular Polarizer - What I like about this one is it has front threads, which means I can add another filter in front without losing the polarization effect. If anyone has used this and would be willing to comment on the pros and cons that would be fantastic!

Amongst the 3 choices, which one would you choose? I will greatly appreciate any insights you might have to offer. I primarily shoot landscapes, nature and quite a bit of waterfalls.

Cheers!

I'm using a Singh-Ray Neutral. I had a warming Singh-Ray polarizer and sold it and kept the neutral filter. I'm satisfied with it, no complaint. I can't say anything on the B+W filter.

I have both Singh-Rays that you mention and prefer the warm version. You can't go wrong with Singh-Ray. Beware of stacking filters as you will generally increase vignetting. That is why the "thin" versions of many filters do not have front threads. As a landscape shooter, you may also want to consider the Singh-Ray Vari-ND Duo filter. Has a built in polarizer, so no need to stack. Absolutely indespensible for slowing down the shutter when shooting water. Singh-Ray filters are very pricey, but totally worth the cost.